Yes and no. ASTM E84/UL 723 is a Class A rating but to achieve this a wood building product must only pass a 10-minute fire-test. IBC and IWUIC ignition-resistant FRTW must pass an extended 20-minute fire-test for a total duration of 30-minutes. Essentially, achieving better than Class A. It is critical to understand this distinction and verify any product claiming to be WUI compliant and Class A has passed the extended 30-minute fire-test for flame spread and smoke development, and this is only performed after ASTM D2898 Accelerated Weathering.